CN109403414A - A kind of handle steering hydraulic system - Google Patents
A kind of handle steering hydraulic system Download PDFInfo
- Publication number
- CN109403414A CN109403414A CN201811621274.7A CN201811621274A CN109403414A CN 109403414 A CN109403414 A CN 109403414A CN 201811621274 A CN201811621274 A CN 201811621274A CN 109403414 A CN109403414 A CN 109403414A
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- Prior art keywords
- valve
- steering
- pressure
- oil
- switching valve
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/225—Control of steering, e.g. for hydraulic motors driving the vehicle tracks
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Power Steering Mechanism (AREA)
- Guiding Agricultural Machines (AREA)
Abstract
The present invention announces a kind of handle steering hydraulic system, belongs to engineering machinery field.Variable pump is connected with pressure-gradient control valve, and the pressure-gradient control valve is connected with switching valve, switching valve control connection steering cylinder；The import of steering tiller is connected with guide oil source valve, and the one outlet of steering tiller is connected with the first limit valve, another outlet of steering tiller is connected with the second limit valve；The oil return opening of steering tiller is connect with fuel tank；Unidirectional valve group module tool is there are two oil circuit, between one control mouth of first limit valve of oil circuit connection and switching valve of unidirectional valve group module, between another second limit valve of oil circuit connection of unidirectional valve group module and switching valve another control mouth.The present invention controls Vehicular turn by pilot handle, simple, convenient；The stability that the commutation of switching valve valve rod is controlled by unidirectional valve group module, and then controls the stability of steering system, and when reducing because turning to commutation suddenly or stopping suddenly, the shaking of vehicle, steering operation is more comfortable.
Description
Technical field
The present invention relates to engineering machinery field, specifically a kind of handle steering hydraulic system is suitable for loading machine steering system
System.
Background technique
In the prior art, most use direction disk steering of the engineering trucks such as loading machine or half wheel steering, general side
It is turned in circulation at work to disk and encloses left and right in 6-8, and major part has that handling maneuver is heavy, and loading machine is being made
When industry, the steering operation of loading machine is more frequent, and after long-time operation machine operation, driver is easy to appear fatigue.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of handle steering hydraulic system.
The invention is realized by the following technical scheme: a kind of handle steering hydraulic system, including variable pump, steering tiller and
Unidirectional valve group module；The variable pump is connected with pressure-gradient control valve, and the pressure-gradient control valve is connected with switching valve, the switching valve control connection
Steering cylinder；The import of the steering tiller is connected with guide oil source valve, and the one outlet of steering tiller is connected with the first limit
Another outlet of valve, steering tiller is connected with the second limit valve；The oil return opening of steering tiller is connect with fuel tank；The check valve
Group module tool there are two oil circuit, first limit valve of oil circuit connection and one control mouth of switching valve of unidirectional valve group module it
Between, between another second limit valve of oil circuit connection of unidirectional valve group module and switching valve another control mouth；Described in each
For oil circuit tool there are two check valve, the check valve pressure into the check valve pressure ratio opposite direction of switching valve path direction is low.
It is further: the switching valve includes reversal valve, the first hydraulic damping, the second hydraulic damping, the hydraulic resistance of third
Buddhist nun, two-way overload valve, shuttle valve, overflow valve, unidirectional Fill valve；Switching valve have the first working hole, the second working hole, oil return opening,
First control mouth, the second control mouth, signal port and leakage mouth；First working hole of the switching valve, the control of the second working hole connect
Connect two steering cylinders；The oil return opening of switching valve is connected with radiator, and the radiator is connected with filter, and filter is connected to
Fuel tank；The signal port of switching valve is connected to the signal port of the variable pump；The leakage mouth of switching valve is connected to fuel tank.
The pressure-gradient control valve has first outlet, second outlet, oil return opening, signal port, oil inlet；The first outlet of pressure-gradient control valve
It is connect with the oil inlet of the switching valve, the second outlet of pressure-gradient control valve connects work system；The signal port of pressure-gradient control valve is connected to institute
State the signal port of variable pump；The outlet of the oil inlet link variable pump of pressure-gradient control valve, the oil return opening of pressure-gradient control valve are connected to fuel tank.
The import of the guide oil source valve and the outlet of variable pump connect, the outlet of guide oil source valve and steering tiller into
Mouth connection, the oil return opening of guide oil source valve are connected to fuel tank.
Compared with prior art, the beneficial effects of the present invention are:
Vehicular turn is controlled by pilot handle, it is simple, convenient, it solves driver's use direction disk and turns to long-time work
Make driving fatigue problem；
The stability of switching valve valve rod commutation is controlled by unidirectional valve group module, and then controls the stability of steering system, is turned
It is more comfortable to operating；
By the way that the size and unidirectional valve group module back pressure value of throttle orifice d is arranged, the cushion performance turned to when stopping being adjusted, reduces
When because turning to commutation suddenly or stop suddenly, the shaking of vehicle.
Detailed description of the invention
Fig. 1 is present hydraulic system schematic diagram；
Fig. 2 is using the pressure curve during loading machine steering of the invention；
In figure: 1, variable pump；2, guide oil source valve；3, steering tiller；4, the first limit valve；5, the second limit valve；6, check valve
Group module；7, steering cylinder；8, switching valve；9, pressure-gradient control valve；10, radiator；11, filter；12, fuel tank.
Specific embodiment
It is a specific embodiment of the invention below, the present invention will be further described with reference to the accompanying drawings.
As shown in Figure 1, a kind of handle steering hydraulic system, including variable pump 1, steering tiller 3 and unidirectional valve group module 6.
Variable pump 1 is connected with pressure-gradient control valve 9, and pressure-gradient control valve 9 has first outlet CF, second outlet EF, oil return opening, signal port Ls1, oil inlet
Mouthful.The first outlet CF of pressure-gradient control valve 9 is connect with the oil inlet of switching valve 8, and the second outlet EF of pressure-gradient control valve 9 connects other job families
System, provides high pressure fuel source for other work systems；The signal port Ls1 of pressure-gradient control valve 9 is connected to the signal port Ls of variable pump 1.Preferentially
The outlet of the oil inlet link variable pump 1 of valve 9, the oil return opening of pressure-gradient control valve 9 are connected to fuel tank 12.
Pressure-gradient control valve 9 is connected with switching valve 8, and switching valve 8 includes reversal valve, the first hydraulic damping c, the second hydraulic damping d, the
Three hydraulic damping f, two-way overload valve, shuttle valve, overflow valve, unidirectional Fill valve.Switching valve 8 has the first working hole CB, the second work
Make mouth CA, oil return opening, the first control mouth Xb, the second control mouth Xa, signal port X and leakage mouth L.First working hole of switching valve 8
CB, the second working hole CA control two steering cylinders 7 of connection.The oil return opening of switching valve 8 is connected with radiator 10, and radiator 10 connects
It is connected to filter 11, filter 11 is connected to fuel tank 12.The signal port X of switching valve 8 is connected to the signal port Ls of variable pump 1.Turn
Fuel tank 12 is connected to the leakage mouth L of valve 8.
The import of guide oil source valve 2 is connect with the outlet of variable pump 1, the outlet of guide oil source valve 2 and steering tiller 3 into
Mouth connection, the oil return opening of guide oil source valve 2 are connected to fuel tank 12.
The import of steering tiller 3 connects guide oil source valve 2, and the one outlet of steering tiller 3 connects the first limit valve 4, turns
To another second limit valve 5 of outlet connection of handle 3；The oil return opening of steering tiller 3 is connect with fuel tank 12.
Unidirectional valve group module 6 has there are two oil circuit, first limit valve of oil circuit connection 4 of unidirectional valve group module 6 with turn
To between 8 one control mouths of valve, another control of another second limit valve of oil circuit connection 5 and switching valve 8 of unidirectional valve group module 6
Between donsole.There are two check valves for each described oil circuit tool, into the check valve pressure ratio opposite direction of 8 path direction of switching valve
Check valve pressure it is low.
Working principle:
As shown in connection with fig. 2, this figure is to apply the test vehicle of the present embodiment handle steering hydraulic system in steering procedure
Pressure curve, lines are thicker for operating cylinder pressure, and lines are thinner to turn to pilot pressure, respectively describe vehicle left-hand rotation
To and right turn pressure curve；
When vehicle needs, control steering tiller 3 is moved to the left, and L mouthfuls of steering tiller fuel-displaced, through the second limit valve 5 to list
To valve group module 6, certain pressure is arranged in unidirectional valve group module 6, and pressure is sent to Xb mouthfuls of 8 pilot port of switching valve, check valve
Group module 6 controls the stability of 8 valve rod of switching valve commutation, and then controls the stability of steering system.
Similarly: when vehicle needs to turn right, control steering tiller 3 is moved to the right, and R mouthfuls of steering tiller fuel-displaced, through the first limit
Pressure is sent to 8 pilot port of switching valve by position valve 4 to unidirectional valve group module 6, unidirectional valve group module 6 equally setting certain pressure
Xa mouthfuls, unidirectional valve group module 6 controls the stability of 8 valve rod of switching valve commutation, and then controls the stability of steering system.
When steering tiller 3 turns left, Xb mouthfuls of 8 pilot port of switching valve establishes pressure, pushes main valve stem commutation, meanwhile, Xb mouthfuls
Guide oil fuel tank is flowed back to by throttle orifice d；When stopping turning to, steering tiller 3 is back to middle position, the oil liquid of Xb runner and pipeline
Sub-fraction flows back to fuel tank by unidirectional valve group module 6 by throttle orifice b oil return box, another part, passes through setting throttle orifice d's
The cushion performance turned to when stopping being adjusted in size and unidirectional 6 back pressure value of valve group module, and reduction is because of steering commutation suddenly or suddenly
When stopping, the shaking of vehicle.
Similarly, when steering tiller 3 is turned right, Xa mouthfuls of 8 pilot port of switching valve establishes pressure, pushes main valve stem commutation, meanwhile,
Xa mouthfuls of guide oil flows back to hydraulic oil container by throttle orifice c；When stopping turning to, steering tiller 3 is back to middle position, Xa runner and pipe
The oil liquid sub-fraction on road flows back to fuel tank by unidirectional valve group module 6, passes through setting by throttle orifice c oil return box, another part
The size of throttle orifice c and unidirectional valve group back pressure value, be adjusted turn to stop when cushion performance, reduce because turn to suddenly commutation or
When stopping suddenly, the shaking of vehicle, as shown in Fig. 2, steering pressure starts, stopping is substantially steady.8 load signal of switching valve simultaneously
Ls mouthfuls of variable pump are handed to by X oral instructions, realizes and variable pumpage is adjusted according to the variation of load signal in time.
When operating steering tiller 3, switching valve 8 starts to commutate, and then the ls1 of turn signal to pressure-gradient control valve 9 is passed from X oral instructions
Mouthful, push 8 spool of pressure-gradient control valve to be maintained at left position, so that the oil liquid that variable pump 1 exports passes through pressure-gradient control valve CF mouthfuls of supply steering cylinder
7, when not turning to, 8 spool of pressure-gradient control valve is in right position, and the oil liquid of variable pump 1 passes through EF mouthfuls of supply work systems.
Claims (4)
1. a kind of handle steering hydraulic system, it is characterised in that: including variable pump (1), steering tiller (3) and unidirectional valve group module
(6)；
The variable pump (1) is connected with pressure-gradient control valve (9), and the pressure-gradient control valve (9) is connected with switching valve (8), switching valve (8) control
System connection steering cylinder (7)；
The import of the steering tiller (3) is connected with guide oil source valve (2), and the one outlet of steering tiller (3) is connected with first
Limit valve (4), another outlet of steering tiller (3) are connected with the second limit valve (5)；The oil return opening and oil of steering tiller (3)
Case (12) connection；
There are two oil circuit, first limit valves of oil circuit connection of unidirectional valve group module (6) for unidirectional valve group module (6) tool
(4) between (8) control mouths of switching valve, another second limit valve of oil circuit connection (5) of unidirectional valve group module (6) with turn
To between valve (8) another control mouth；There are two check valves for each described oil circuit tool, into switching valve (8) path direction
The check valve pressure of check valve pressure ratio opposite direction is low.
2. a kind of handle steering hydraulic system according to claim 1, it is characterised in that: the switching valve (8) includes changing
To valve, the first hydraulic damping (c), the second hydraulic damping (d), third hydraulic damping (f), two-way overload valve, shuttle valve, overflow valve,
Unidirectional Fill valve；Switching valve (8) have the first working hole (CB), the second working hole (CA), oil return opening, the first control mouth (Xb),
Second control mouth (Xa), signal port (X) and leakage mouth (L)；The first working hole (CB), the second working hole of the switching valve (8)
(CA) two steering cylinders (7) of control connection；The oil return opening of switching valve (8) is connected with radiator (10), the radiator (10)
It is connected with filter (11), filter (11) is connected to fuel tank (12)；The signal port (X) of switching valve (8) is connected to the variable
Pump the signal port (Ls) of (1)；The leakage mouth (L) of switching valve (8) is connected to fuel tank (12).
3. a kind of handle steering hydraulic system according to claim 1, it is characterised in that: the pressure-gradient control valve (9) has the
One outlet (CF), second outlet (EF), oil return opening, signal port (Ls1), oil inlet；The first outlet (CF) of pressure-gradient control valve (9) and institute
The oil inlet connection of switching valve (8) is stated, the second outlet (EF) of pressure-gradient control valve (9) connects work system；The signal port of pressure-gradient control valve (9)
(Ls1) it is connected to the signal port (Ls) of the variable pump (1)；The outlet of the oil inlet link variable pump (1) of pressure-gradient control valve (9), it is excellent
The oil return opening of first valve (9) is connected to fuel tank (12).
4. a kind of handle steering hydraulic system according to claim 1, it is characterised in that: the guide oil source valve (2)
Import is connect with the outlet of variable pump (1), and the outlet of guide oil source valve (2) is connect with the import of steering tiller (3), pilot oil source
The oil return opening of valve (2) is connected to fuel tank (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621274.7A CN109403414B (en) | 2018-12-28 | 2018-12-28 | Handle steering hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621274.7A CN109403414B (en) | 2018-12-28 | 2018-12-28 | Handle steering hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109403414A true CN109403414A (en) | 2019-03-01 |
| CN109403414B CN109403414B (en) | 2023-07-25 |
Family
ID=65462422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811621274.7A Active CN109403414B (en) | 2018-12-28 | 2018-12-28 | Handle steering hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109403414B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0564507U (en) * | 1992-02-05 | 1993-08-27 | 新キャタピラー三菱株式会社 | Hydraulic pressure booster circuit |
| CN104973122A (en) * | 2015-05-18 | 2015-10-14 | 徐工集团工程机械股份有限公司科技分公司 | Loader electronic-control-handle steering and intelligent-braking control system |
| CN205895729U (en) * | 2016-07-29 | 2017-01-18 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic system and have its engineering vehicle |
| CN108263971A (en) * | 2018-02-05 | 2018-07-10 | 苏州辰晟优机电科技有限公司 | A kind of spider shape crawler crane |
| CN209368939U (en) * | 2018-12-28 | 2019-09-10 | 徐工集团工程机械股份有限公司科技分公司 | Handle steering hydraulic system |
-
2018
- 2018-12-28 CN CN201811621274.7A patent/CN109403414B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0564507U (en) * | 1992-02-05 | 1993-08-27 | 新キャタピラー三菱株式会社 | Hydraulic pressure booster circuit |
| CN104973122A (en) * | 2015-05-18 | 2015-10-14 | 徐工集团工程机械股份有限公司科技分公司 | Loader electronic-control-handle steering and intelligent-braking control system |
| CN205895729U (en) * | 2016-07-29 | 2017-01-18 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic system and have its engineering vehicle |
| CN108263971A (en) * | 2018-02-05 | 2018-07-10 | 苏州辰晟优机电科技有限公司 | A kind of spider shape crawler crane |
| CN209368939U (en) * | 2018-12-28 | 2019-09-10 | 徐工集团工程机械股份有限公司科技分公司 | Handle steering hydraulic system |
Non-Patent Citations (1)
| Title |
|---|
| 马先启等, 国防工业出版社 * |
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| Publication number | Publication date |
|---|---|
| CN109403414B (en) | 2023-07-25 |
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